permissions: remove PermissionQueueController and introduce PermissionInfoBarManager

chrome/browser/permissions/permission_infobar_request.h

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_PERMISSIONS_PERMISSION_INFOBAR_REQUEST_H_
+#define CHROME_BROWSER_PERMISSIONS_PERMISSION_INFOBAR_REQUEST_H_
+
+#include "base/callback.h"
+#include "base/memory/weak_ptr.h"
+#include "components/content_settings/core/common/content_settings.h"
+#include "url/gurl.h"
+
+class InfoBarService;
+class Profile;
+
+namespace content {
+class WebContents;
+}  // namespace content
+
+namespace infobars {
+class InfoBar;
+}  // namespace infobars
+
+// Represents a permission request which will be displayed using an InfoBar.
+class PermissionInfoBarRequest {
+ public:
+  PermissionInfoBarRequest(
+      int request_id,
+      const GURL& requesting_origin,
+      const GURL& embedding_origin,
+      const base::Closure& callback);
+  ~PermissionInfoBarRequest();
+
+  // Adds a permisison type which should be associated with this request.
+  void AddPermission(
+      const ContentSettingsType type,
+      const base::Callback<void(bool, ContentSetting)>& response_callback);
+
+  // Shows the relavent infobar for this request in the specified web contents.

[mlamouri (slow - plz ping), 2015/10/02 11:49:39]

I think you should add comments regarding the relationship between
AddPermission() and ShowInfobar(). What happens if they are call next to each
other in different orders.

[Lalit Maganti, 2015/10/02 13:37:45]

Done.

+  bool ShowInfobar(content::WebContents* web_contents);
+
+  // Used to manually accept the request.

[mlamouri (slow - plz ping), 2015/10/02 11:49:40]

Here and below. What do you mean by "manually"?

[Lalit Maganti, 2015/10/02 13:37:45]

Done.

+  void Accept();
+
+  // Used to manually dismiss the request.
+  void Closing();
+
+  // Used to manually cancel the request.
+  void Cancel();
+
+  int request_id() const { return request_id_; }
+
+ private:
+  using PermissionDecidedCallback = base::Callback<void(bool, ContentSetting)>;
+  class PermissionRequest {
+   public:
+    PermissionRequest(ContentSettingsType type,
+                      const PermissionDecidedCallback& response_callback);
+    ~PermissionRequest();
+
+    ContentSettingsType type() const { return type_; }
+    const PermissionDecidedCallback& response_callback() const {
+      return response_callback_;
+    }
+
+   private:
+    ContentSettingsType type_;
+    PermissionDecidedCallback response_callback_;

[mlamouri (slow - plz ping), 2015/10/02 11:49:39]

nit: rename |callback_|.

[Lalit Maganti, 2015/10/02 13:37:45]

Done.

+  };
+
+  // Called when this request is dismissed manually.
+  void OnManualClose();
+
+  // Callback function used when single permission infobar is shown.

[mlamouri (slow - plz ping), 2015/10/02 11:49:39]

"Shown" for "OnPermissionSet"?

[Lalit Maganti, 2015/10/02 13:37:45]

Done.

+  void OnPermissionSet(bool update_content_setting,
+                       bool allowed);
+
+  // Callback function used when a coalesced infobar is shown.

[mlamouri (slow - plz ping), 2015/10/02 11:49:39]

ditto

[Lalit Maganti, 2015/10/02 13:37:45]

Done.

+  void OnPermissionsSet(bool update_content_setting,
+                        const std::vector<ContentSetting>& allowed);
+
+  // Removes any permissions from this request for which there is already
+  // a user specified ContentSetting.

[mlamouri (slow - plz ping), 2015/10/02 11:49:39]

nit: do not mention ContentSetting. Maybe:
"""
Removes any permissions from this request for which there is no need to prompt
the user.
"""

[Lalit Maganti, 2015/10/02 13:37:45]

Done.

+  void PruneAnsweredPermissions(Profile* profile);
+
+  // Creates the single permission infobar for the PermissionRequest|

[mlamouri (slow - plz ping), 2015/10/02 11:49:40]

nit: remove "|"

[Lalit Maganti, 2015/10/02 13:37:45]

Done.

+  // specified.
+  void CreateInfoBar(InfoBarService* infobar_service,
+                     const PermissionRequest& request,
+                     const std::string& display_languages,
+                     const base::Callback<void(bool, bool)>& callback);
+
+  // Owned by InfoBarService.
+  infobars::InfoBar* infobar_;
+
+  int request_id_;
+  GURL requesting_origin_;
+  GURL embedding_origin_;
+  base::Closure callback_;
+  std::vector<PermissionRequest> requests_;
+
+  base::WeakPtrFactory<PermissionInfoBarRequest> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(PermissionInfoBarRequest);
+};
+
+#endif  // CHROME_BROWSER_PERMISSIONS_PERMISSION_INFOBAR_REQUEST_H_